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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 714 · 40 questions
TalentJR

The fast method (Ten and half again): Multiply by 10: 46 → 460. Halve that answer: half of 460 is 230. Add the two: 460 + 230 = 690.

NameDateTime takenScore ___ / 40
  1. 1.32 × 15 =
  2. 2.52 × 15 =
  3. 3.54 × 15 =
  4. 4.38 × 15 =
  5. 5.34 × 15 =
  6. 6.12 × 15 =
  7. 7.23 × 15 =
  8. 8.20 × 15 =
  9. 9.27 × 15 =
  10. 10.62 × 15 =
  11. 11.40 × 15 =
  12. 12.37 × 15 =
  13. 13.33 × 15 =
  14. 14.28 × 15 =
  15. 15.49 × 15 =
  16. 16.19 × 15 =
  17. 17.59 × 15 =
  18. 18.5 × 15 =
  19. 19.10 × 15 =
  20. 20.45 × 15 =
  21. 21.28 × 15 =
  22. 22.43 × 15 =
  23. 23.22 × 15 =
  24. 24.41 × 15 =
  25. 25.31 × 15 =
  26. 26.54 × 15 =
  27. 27.43 × 15 =
  28. 28.10 × 15 =
  29. 29.45 × 15 =
  30. 30.60 × 15 =
  31. 31.25 × 15 =
  32. 32.56 × 15 =
  33. 33.45 × 15 =
  34. 34.47 × 15 =
  35. 35.12 × 15 =
  36. 36.38 × 15 =
  37. 37.37 × 15 =
  38. 38.9 × 15 =
  39. 39.64 × 15 =
  40. 40.45 × 15 =

Answer key

  1. 480
  2. 780
  3. 810
  4. 570
  5. 510
  6. 180
  7. 345
  8. 300
  9. 405
  10. 930
  11. 600
  12. 555
  13. 495
  14. 420
  15. 735
  16. 285
  17. 885
  18. 75
  19. 150
  20. 675
  21. 420
  22. 645
  23. 330
  24. 615
  25. 465
  26. 810
  27. 645
  28. 150
  29. 675
  30. 900
  31. 375
  32. 840
  33. 675
  34. 705
  35. 180
  36. 570
  37. 555
  38. 135
  39. 960
  40. 675

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